code: def subtest_total_counts(self):
      if self.k in [0, self.n]:
          return
  
      cnt = np.zeros(self.n)
      for s in self.samples:
          for x in s:
              cnt[x] += 1
  
      m = len(self.samples)
  
      p = self.k / self.n
      mean = m * p
      std = np.sqrt(m * p * (1 - p))
  
      self.subtest_normal_distrib(cnt, mean, std)
  
file_path: pfrl/tests/utils_tests/test_random.py
imports: import timeit
  import unittest
  import numpy
  import pytest
  from scipy import stats
  from pfrl.utils.random import sample_n_k
label_desc: Use image node_id 5 for calling the TestSampleNK obj's underlying member method code with example usage: obj.subtest_total_counts() without return types